🐣 문제

링크 : https://www.acmicpc.net/problem/15649

🐥 코드

#include <iostream>

using namespace std;
#define MAX 9
int N, M;
int arr[MAX];
bool visited[MAX];

void dfs(int cnt){
	if(cnt >= M){
		for(int i = 0; i < M; i++)
			cout << arr[i] << " ";
		cout << '\n';
		return;
	}
	else{
		for(int i = 1; i <= N; i ++){
			if(!visited[i]){
				visited[i] = true;
				arr[cnt] = i;
				dfs(cnt + 1);
				visited[i] = false;
			}
		}
	}
}

int main(){
	cin >> N >> M;
	dfs(0);
}